Remove ant file. Fixes #75
Merge pull request #80 from surevine/ant

Remove ant file
Merge pull request #81 from surevine/issue-68

Only allow owner unsubscribe if there is more than 1 owner (i.e. another owner)
Merge pull request #84 from surevine/master

Overwrite defaultAffiliation if we already have one. Fixes #69.
Small code tidy
Merge branch 'master' of github.com:buddycloud/buddycloud-server-java